Constify ro_uri_launch()

If the URL is too long to fit into a non-indirected ANT URLLoad message, then skip the ANT URLLoad broadcast and jump straight to using URI_Dispatch. 
We don't support indirected ANT URLLoad messages as their potential for memory leakage is too great.

svn path=/trunk/netsurf/; revision=8233

riscos/uri.c

@@ -64,7 +64,7 @@ void ro_uri_message_received(wimp_message *msg)
 	free(uri_requested);
 }
 
-bool ro_uri_launch(char *uri)
+bool ro_uri_launch(const char *uri)
 {
 	uri_h uri_handle;
 	wimp_t handle_task;
@@ -84,19 +84,35 @@ bool ro_uri_launch(char *uri)
 void ro_uri_bounce(wimp_message *msg)
 {
 	uri_full_message_process *message = (uri_full_message_process *)msg;
-	char uri_buf[512];
+	int size;
+	char *uri_buf;
 	os_error *e;
 
 	if ((message->flags & 1) == 0)
 		return;
 
-	e = xuri_request_uri(0, uri_buf, sizeof uri_buf, message->handle, 0);
+	/* Get required buffer size */
+	e = xuri_request_uri(0, NULL, 0, message->handle, &size);
 	if (e) {
 		LOG(("xuri_request_uri: %d: %s", e->errnum, e->errmess));
 		return;
 	}
 
+	uri_buf = malloc(size);
+	if (uri_buf == NULL)
+		return;
+
+	/* Get URI */
+	e = xuri_request_uri(0, uri_buf, size, message->handle, 0);
+	if (e) {
+		LOG(("xuri_request_uri: %d: %s", e->errnum, e->errmess));
+		free(uri_buf);
+		return;
+	}
+
 	ro_url_load(uri_buf);
 
+	free(uri_buf);
+
 	return;
 }

riscos/uri.h

@@ -24,7 +24,7 @@
 #include "oslib/wimp.h"
 
 void ro_uri_message_received(wimp_message *message);
-bool ro_uri_launch(char *uri);
+bool ro_uri_launch(const char *uri);
 void ro_uri_bounce(wimp_message *message);
 
 #endif

riscos/url_protocol.c

@@ -131,8 +131,11 @@ void ro_url_broadcast(const char *url)
 	os_error *error;
 	int len = strlen(url) + 1;
 
-	if (236 < len)
-		len = 236;
+	/* If URL is too long, then forget ANT and try URI, instead */
+	if (236 < len) {
+		ro_uri_launch(url);
+		return;
+	}
 
 	message.size = ((20+len+3) & ~3);
 	message.your_ref = 0;